-LRB- CNN -RRB- -- The Bangladeshi military has revised the number of army officers missing after last week 's bloody uprising , from 72 down to six .

Bangladeshi soldiers carry a coffin during a funeral Monday for victims of last week 's mutiny .

The earlier number was based on `` assumptions , '' said Lt. Gen. Sina Ibn Jamali , the army chief of general staff .

`` The numbers we are giving now are grounded in facts , '' Jamali told reporters Sunday night .

Authorities said confusion arose because no one knew for sure how many officers were inside the Bangladesh Rifles headquarters when paramilitary troops , or jawans , staged a bloody revolt and took dozens of them hostage Wednesday .

Search crews have recovered 73 bodies from a river , sewers and three mass graves inside the Rifles compound in the Pilkhana area of the capital , Dhaka .

Of those bodies , 53 were confirmed as those of army officers .

Meanwhile , an army investigation into the 35-hour rebellion began Monday .

The police have filed murder charges against more than 1,000 Rifles , and soldiers were out in full force throughout Bangladesh looking for them .

The 65,000-strong Rifles is a border security force -- distinct from the army , but whose commanders are career army officers .

The jawans had complained for years that their army superiors dismissed their appeals for more pay , subsidized food and the opportunity to participate in U.N. peacekeeping operations , which pay far more than what they make at home .

The two-day standoff ended after Prime Minister Sheikh Hasina promised the jawans amnesty if they laid down their arms .

She has backtracked since , saying the government will not show mercy to those who killed , looted or committed arson .

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Number of army officers missing after mutiny is six , down from earlier estimate of 72

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Confusion arose because no one was certain how many officers were involved

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Murder charges filed against more than 1,000 members of Bangladesh Rifles